Disabling B1S1 for WB tuning?

[Chris671]

Hi all,

I'm getting ready to start calibrating my VVE table using a wideband and I was curious if there were any extra steps to take if I wanted to use the factory pre-cat O2 bung to install my WB sensor for the process instead of getting another bung welded in?

Any input is greatly appreciated.

[Ben Charles]

If you unplug the WB it will result in open loop on that side..
What I like to do in that case is force car into open loop via the tune (max out time delay and ECT)

[Chris671]

Thanks for the input Ben!! I wasn't sure if tuning in OL for anything other than WOT was feasible.

[Chris671]

Is this afr error method more accurate than the fuel trim method?

[5FDP]

Using AFR or Lambda is far more accurate than the narrow band o2 sensors fuel trims. Trims are not active during open loop and full throttle, so a wideband is required there.

Fuel trims are better used once things with the wideband are done.

[Chris671]

Good to know. I will tune with my WB and compare with fuel trims when I'm done.

Thanks 5FDP!